W-H355 and W-H355R addressable, wireless heat detectors use a state-of-the-art thermistor sensing circuit for a fast response. The W-H355 and W-H355R provide fixed temperature alarm detection at 135°F. The W-H355R also provides Rate-of-Rise Detection at 15°F/min. These detectors are designed to provide open area protection and are intended for use with the MS-9200UDLS and MS-9600(UD)LS Addressable Fire Alarm Control Panels. The W-H355 and W-H355R communicate with the fire alarm control panels through a wireless mesh network to the W-GATE wireless gateway.